Malicious PDF — malware analysis report

Static analysis result for SHA-256 671ab757bfc1c64c…

MALICIOUS

PDF

34.1 KB Created: 2020-08-12 21:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 066f6c0cd792efc37999e2a6502b4bdd SHA-1: 1366bb349ef2641344fb4bc6caedebc599675f32 SHA-256: 671ab757bfc1c64c43b301433074736d80f1d0972b2c27f0da05ee9ef3d6285c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body itself contains a link to this redirector, suggesting a phishing or scam attempt to trick users into downloading potentially malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=biblia+takatifu+swahili+pdf In PDF document text
    • http://files.busybeesweet.com/uploads/1/3/1/3/131398452/0e2c6ff.pdfIn PDF document text
    • http://files.kosative.com/uploads/1/3/1/3/131379014/1883196.pdfIn PDF document text
    • http://files.utilitytec.com/uploads/1/3/0/7/130739924/lixojepox_rakepivatazazim_zuvasu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2086/9019/files/jewibovuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52244446143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/netekemotisaderiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/7712956357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9788/2773/files/totadusasuninifavimoruzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/kujemopesaves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5609/5644/files/10283411473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/82429652380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9063/2101/files/fumizugoselanunom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8005/5965/files/crisis_adrenal_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7328/1948/files/vopijujataxasoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/alvin_schwartz_scary_stories_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0695/0557/files/sebc_caste_list_in_gujarat.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47D5 5380 bytes
SHA-256: e2d94278d2497538a9426671ddf876f4f45dd5cb384fc00197ef62a71c3421a9
font_01_sfnt_off00005a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A23 9892 bytes
SHA-256: b45bae25ca6cababbb9a14e29e6acda26cc2e953a68f7f1b4b9d93584f7ecdc6

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